last weekend at our test-n-tune I was using R6's on my DS prepped 330i sport.
I drove another guy's bone stock 330i ZHP with pilot sports, and came within 3 tenths of my time. oem shocks, sways, and pads.
Maybe I drove well, and maybe the ZHP is a better car, but another data point tells the real story, we have a long concrete section that we do a lot of slaloms on. A6s usually have a lot of grip there and I can pretty flat foot it the whole way, but on sunday I was sliding around pretty significantly.
The R6's definitely have less grip. I think they're better than the street tires, but these days the gap is closing.
DS #313 | the rolling couch of doom | La-Z-Boy Racing